1pmt
From Proteopedia
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| - | [[Image:1pmt.gif|left|200px]] | + | [[Image:1pmt.gif|left|200px]] |
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| - | '''GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS''' | + | {{Structure |
| + | |PDB= 1pmt |SIZE=350|CAPTION= <scene name='initialview01'>1pmt</scene>, resolution 2.5Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=GTT:GLUTATHIONE'>GTT</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Glutathione_transferase Glutathione transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.18 2.5.1.18] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1PMT is a [ | + | 1PMT is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Proteus_mirabilis Proteus mirabilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PMT OCA]. |
==Reference== | ==Reference== | ||
| - | A mixed disulfide bond in bacterial glutathione transferase: functional and evolutionary implications., Rossjohn J, Polekhina G, Feil SC, Allocati N, Masulli M, De Illio C, Parker MW, Structure. 1998 Jun 15;6(6):721-34. PMID:[http:// | + | A mixed disulfide bond in bacterial glutathione transferase: functional and evolutionary implications., Rossjohn J, Polekhina G, Feil SC, Allocati N, Masulli M, De Illio C, Parker MW, Structure. 1998 Jun 15;6(6):721-34. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9655824 9655824] |
[[Category: Glutathione transferase]] | [[Category: Glutathione transferase]] | ||
[[Category: Proteus mirabilis]] | [[Category: Proteus mirabilis]] | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:26:20 2008'' |
Revision as of 11:26, 20 March 2008
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| , resolution 2.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Glutathione transferase, with EC number 2.5.1.18 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS
Overview
BACKGROUND: Glutathione S-transferases (GSTs) are a multifunctional group of enzymes, widely distributed in aerobic organisms, that have a critical role in the cellular detoxification process. Unlike their mammalian counterparts, bacterial GSTs often catalyze quite specific reactions, suggesting that their roles in bacteria might be different. The GST from Proteus mirabilis (PmGST B1-1) is known to bind certain antibiotics tightly and reduce the antimicrobial activity of beta-lactam drugs. Hence, bacterial GSTs may play a part in bacterial resistance towards antibiotics and are the subject of intense interest. RESULTS: Here we present the structure of a bacterial GST, PmGST B1-1, which has been determined from two different crystal forms. The enzyme adopts the canonical GST fold although it shares less than 20% sequence identity with GSTs from higher organisms. The most surprising aspect of the structure is the observation that the substrate, glutathione, is covalently bound to Cys 10 of the enzyme. In addition, the highly structurally conserved N-terminal domain is found to have an additional beta strand. CONCLUSIONS: The crystal structure of PmGST B1-1 has highlighted the importance of a cysteine residue in the catalytic cycle. Sequence analyses suggest that a number of other GSTs share this property, leading us to propose a new class of GSTs - the beta class. The data suggest that the in vivo role of the beta class GSTs could be as metabolic or redox enzymes rather than conjugating enzymes. Compelling evidence is presented that the theta class of GSTs evolved from an ancestral member of the thioredoxin superfamily.
About this Structure
1PMT is a Single protein structure of sequence from Proteus mirabilis. Full crystallographic information is available from OCA.
Reference
A mixed disulfide bond in bacterial glutathione transferase: functional and evolutionary implications., Rossjohn J, Polekhina G, Feil SC, Allocati N, Masulli M, De Illio C, Parker MW, Structure. 1998 Jun 15;6(6):721-34. PMID:9655824
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